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SUBSEQUENT EVENTS (Details) (USD $) In Millions, except Share data, unless otherwise specified | 1 Months Ended |  | 1 Months Ended
--- | --- | --- | ---
Feb. 28, 2012 Chief Executive Officer [Member] Issuance of Equity Related to Share-based Compensation Plan [Member] | Feb. 28, 2012 Chief Executive Officer [Member] Sale of Equity Shares by Executive Officer [Member] | Jan. 31, 2012 1520 North Milwaukee Avenue [Member] Chicago Illinois [Member] Acquisition [Member] sqft | Feb. 28, 2012 640 Broadway [Member] New York New York [Member] Fund III [Member] Acquisition [Member] | Feb. 28, 2012 Single Tenant Property [Member] Cambridge Massachusetts [Member] Acquisition [Member] sqft | Apr. 30, 2011 Opportunity Funds [Member] Chicago Illinois [Member] Fund III [Member] sqft | Feb. 28, 2012 Opportunity Funds [Member] 640 Broadway [Member] New York New York [Member] Fund III [Member] Acquisition [Member] sqft | Jan. 31, 2012 Common Stock [Member] Maximum [Member] Issuance of Equity [Member]
Subsequent Event [Line Items] |  |  |  |  |  |  |  |
Common Stock, Reserved for Future Issuance, Value, At The Market Equity Program |  |  |  |  |  |  |  | $ 75.0
Square Footage of Real Estate Property (in feet) |  |  | 3,100 |  | 40,000 | 105,000 | 45,700 |
Business Acquisition, Cost of Acquired Entity, Purchase Price |  |  | 3.8 | 32.5 | 19.2 | 31.6 |  |
Business Acquisition, Debt Assumption |  |  |  |  | $ 7.0 |  |  |
Stock Issued During Period, Shares, Conversion of Units (in shares) | 150,000 |  |  |  |  |  |  |
Number of Shares of Common Stock Sold by Executive (in shares) |  | 75,000 |  |  |  |  |  |

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- Definition The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition The amount of debt that an Entity assumes in acquiring a business or in consideration for an asset received in a noncash (or part noncash) acquisition. Noncash is defined as transactions during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 32 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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